defbubble_sort(nums):
    swapped = True
    while swapped:
        swapped = False
        for i in range(len(nums)-1):
            if nums[i] > nums [i+1]:
                nums[i] , nums [i+1] = nums[i + 1] , nums[i]
                swapped = True
def read2list(filename):
    file = open(filename , 'r')
    data = file.readlines ()
    return data
